As I reported earlier, when my nvidia driver
accesses monitors with 10 bpc, I loose access
to the VideoLUT. Still unwilling to accept
defeat, I ran dispwin in a debugger and found
something strange (this is version 1.8.3):
The visual-ID 0x21 seems to be correct, as I've
seen that already in several other contexts.
However, the bits_per_rgb is 11 instead of 10.
Where might this additional bit come from? Is
this a bug in the nvidia driver?